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Theorem psubclssatN 39928
Description: A closed projective subspace is a set of atoms. (Contributed by NM, 25-Jan-2012.) (New usage is discouraged.)
Hypotheses
Ref Expression
psubclssat.a 𝐴 = (Atoms‘𝐾)
psubclssat.c 𝐶 = (PSubCl‘𝐾)
Assertion
Ref Expression
psubclssatN ((𝐾𝐷𝑋𝐶) → 𝑋𝐴)

Proof of Theorem psubclssatN
StepHypRef Expression
1 psubclssat.a . . 3 𝐴 = (Atoms‘𝐾)
2 eqid 2729 . . 3 (⊥𝑃𝐾) = (⊥𝑃𝐾)
3 psubclssat.c . . 3 𝐶 = (PSubCl‘𝐾)
41, 2, 3psubcliN 39925 . 2 ((𝐾𝐷𝑋𝐶) → (𝑋𝐴 ∧ ((⊥𝑃𝐾)‘((⊥𝑃𝐾)‘𝑋)) = 𝑋))
54simpld 494 1 ((𝐾𝐷𝑋𝐶) → 𝑋𝐴)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395   = wceq 1540  wcel 2109  wss 3911  cfv 6499  Atomscatm 39249  𝑃cpolN 39889  PSubClcpscN 39921
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-sep 5246  ax-nul 5256  ax-pow 5315  ax-pr 5382
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-ral 3045  df-rex 3054  df-rab 3403  df-v 3446  df-dif 3914  df-un 3916  df-in 3918  df-ss 3928  df-nul 4293  df-if 4485  df-pw 4561  df-sn 4586  df-pr 4588  df-op 4592  df-uni 4868  df-br 5103  df-opab 5165  df-mpt 5184  df-id 5526  df-xp 5637  df-rel 5638  df-cnv 5639  df-co 5640  df-dm 5641  df-iota 6452  df-fun 6501  df-fv 6507  df-psubclN 39922
This theorem is referenced by:  pmapidclN  39929  psubclinN  39935  paddatclN  39936  pclfinclN  39937  poml6N  39942  osumcllem3N  39945  osumcllem9N  39951  osumcllem11N  39953  osumclN  39954
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